Electric-lighting fixture



Jan. 29,

E. C. WHITE ELECTRIC LIGHTING FIXTURE Filed Feb. 19, 1925 FIG 3 FIG 2FIG! IN VEN TOR Patented Jan. 29, 1929.

UNITED STATES PATENT OFFICE.

ERNEST OANTELO WHITE, OF NEW YORK, N. Y., ASSIGNOR 0F ONE-HALF '10 3.FEN- TON FISHER, OF PHILADELPHIA, PENNSYLVANIA.

ELECTRIC-LIGHTING FIXTURE.

Application filed February 19, 1925. Serial No. 10,182.

My invention relates to the methods of con structing all types ofelectric lighting fixtures including wall brackets, ceiling fixtures,chandeliers, table lamps, floor lamps, adjustable fixtures and allappliances or parts thereof which contain or include a lamp socket.

The objects of my invention are to construct lighting fixtures from aminimum number of moulded or cast parts; to facilitate the wiring offixtures by making it possible to assemble the necessary wires andwiring devices and fit same into the outer parts without the necessityfor providing cored or hollowed parts or the expense of drawing 1n Wiresor attaching Wiring devices in the usual manner; to eliminate allpossibility of twistingwires and causing short circuits within fixturesby placmg all wlres and wlrlng devices in readily available open spacesand then assembling the parts to provide any desired enclosure andfinish; and to provide such complete enclosure by the assembly of twoparts.

made from the same mould. A further object of my invention is toconstruct such moulded parts of insulating material so as to eliminateall unnecessary insulated parts of the wires and wiring devicescontained therein; A

7 further object is to facilitate the construction of said moulded partsfrom material which may not require to be plated, painted, colored,lacquered or otherwise surface-treated in order to present the desiredappearance, so that the finish may be more permanent. further object'ofmy invention is to provide a lighting fixture of compact design providedwith a socket which may be used for an electric lamp, another socketwhich may be. used for an attachment plug, switch control of one of saidsockets independent of theother when desired, a single pair ofconductors for both sockets, and parts moulded to receive the wires andwlring devices and to support all parts in the, desired relation whenassembled.

In the accompanyingdrawings, Fig. 1 is a side view of an electricbracket Fig. 2 is a cross-section thereof on the line G -C;' Fig. 3 is afront view thereof; Fig. 4 is a bottom view of the wall plateportionthereof; 5

is an inside view of one of themoulded halves of the outer casing; Fig.6 is a horizontal sec- 7 tion of they complete bracket without wire orwiring devices on the line AA in Fig. 5;

Fig. 7 is a view of the sockets and wire connected together; Fig. 8 isaview of the sockets and wire assembled into the-moulded half casvertically,

exactly alike and only distinguished from I sitions. In other words, ifpart 1 is revolved 180 degrees about the horizontal axis represented bypoint X in the front view and line XX in the side View, it would occupythe position of part 2. Therefore, as the two parts are made from thesame mould, a description of one of these parts is to be taken asapplying to both, and in this embodiment it is assumed that the partsare to be moulded of insulating material. A hole 3-is provided for ascrew 4, on the end of which a nut is screwed to draw the two halves ofthe bracket together. The diameter of the screw 4 fits the hole 3closely so that the two halves of the bracket'cannot move with respectto each other except rotatably about the center of the screw 4. Suchrotation is rendered impossible by the provision of the projection 5 and.the corresponding recess 6 in the front edge of the part 2. The saidprojection and recessare of course symmetrically and oppositely disposedaround the axis X-X so that when the two parts are oined together theprojec tion of one fits into the recess of the other.

A The back edge of the part 2 is likewise provided with a projection 7and a corresponding recess 8 similarly disposed around the axis Lookingtherefore at Fig. 5, it will be seen that when two parts are assembledthey interlock at three points, namely: 7, 8 and 56 to prevent relativerotation of the parts around the center 3.

The part 219 provided with an approximately cylindrical space 9 toaccommodate the twin socket illustrated in Fig. 7 and a hole 25 toreceive one of the push buttons of said jsocket.

Bearin surfaces 26 are provided to retain the s ightly enlarged centerbody of the twin socket in fixed adjustment and the diameter of theupper and lower spaces is such as to fit the outside ofthe screw shells20 and 21. Part 2 is also provided with wire grooves 10 and 11 torecelve each other by their respective assembled pothe conductors orwires 12 and 13, andalso a space 14 to accommodate the joints betweenthese. wires and the supply. wires When the bracketis installed.Recesses 15 and 16 are when the parts are drawn together.

provided so that when the parts are assembled, these. provide holes forthe supporting screws 17 and 18 which are provided forattachingth-e-bracket to an outlet. 7

The twin socket 1 9- is provided with two oppositely disposed socketscrew shells 20 and 21 which are connected together electrically andconnected to wire 13. The centercontact of the lower socket is inpermanent contact with wire 12. which also supplies the center. contactof the upper socket through the push. switch 22. It will therefore beunderstood that when the socket. is connected to an electric line, thelower socket will always he on and the upper socket may be turned on andofiby means of the switch.

The arrangement of parts is such that'the wires 12 and 13 may be barewires as. they are effectively supported and separated in the insulatedmaterial and may be connected to thesocket as shown withoutany-risk ofcontact between parts of oppositev polarity and the rear ends of thesebare wires. projectfrom the-insulation at points 23 and 24; whicharewidely separated so that ample room is provided for connecting thesewires to the supply wires of the outlet.

In actually assembling the parts, one of the great economiesof myinvention becomes evident. The wires 12. and 13 are connected to thebinding screws ofthe socket 19 iIr the most convenient manner. Thesocket and wires are then laid into the spaces9,i10 and 11 of part. 2,the push button on thesocket being inserted through hole. 25. Part 1 isthen. laid over these assembled parts and screwstinserted through hole8, a nut applied to-the-end'ofithe screw and tightened. Thiscompletes-the assembly of the bracket, ready for delivery to the pointwhereitis toibe installed It is to be observed here that'the projactions and recesses 5, 6,- 7 and 8. may be dispensedwith asthesocketlt) fits thespace, 9 int-such a manner as to prevent relativerotation of: theparts 1 and 2 about the center 3 the-use of. insulatingmaterial for the parts 1 and 2.1nay be dispensed with and these partscast in metal, in which. case the socket 19 would be encased in thecommonly-known covering. of parafiinedpaper before being, as-

sembled into the parts 1 and 2-, and the wires 12. and. 131 would be theordinary insulated wiresused in wiring fixtures the grooves 10 and 11being then made correspondingly larger or. combined into one groove toaccommodate insulated wires. proportions of'the entire bracketandparticularly of: the internal spaces 9, 10 and 11 wouldbe: somewhatincreased: by the, use of a. conducting material, for parts 1 and. 2,but.

many; other advantages of, my invention would he obviously retained.

The generalpurpose of this type ofbracket will be understood from thesketch shown in Also In fact, thegeneral.

Fig. 9 in which the bracket isshown as it would be installed in placewith a'lamp and shade used on the upper socket controlled'bythepush-button switch 22 and'anattachment plug connected to the lowersocket for the T purpose of supplying current to some other applianceirrespective of whether the lamp inithe upper socket is turned on oroff.

It must be particularly understood that my invention-isnot limited tothis type ofbrac-ket but inicludesthe construction. of other forms oflighting fixtures from moulded, or cast parts. in. the manner describedeven though the two-halves of any completedpart are not a made fromthesame mould and are not even symmetrical (as might be the'case, for example, whereonly one lampsocket was provided in a; wall bracket) solong, as the: construction and assembly of parts include what I claimas-new', which is. :M

7 arate laterally spaced: passages extendinggbetween the inter-iorsrofsaid base and; housing a to receive and segregate twin lamp socketservice" wires; a lampsocket device in said housing'having; oppositelypointing lamp receptacles, said. lampreceptacles having common servicewires connected therewith and extending respectively back through saidre spective arm passages. intosaid hollow base; said housing havinginternal, shoulders to "engage and retain said lamp socket. deviceagainst longitudinal displacement; andlla single fastening. meansextending, transversely v through said arm intermediate its passages toretain said fixture members assembled.

2. In an electric lighting fixture as defined in, claim 1 in which. themeeting: edgesof its matching members are, provided with 00- operative,tongues and recesses adapted by their interengagement to retain saidmembers against rotativedisplacement in relation one to the other, saidtongues and recesses lying flush withfthe external surface planes. ofsaid members; i a 1115 3.. An electric lighting fixture comprising twolamp sockets-aligned onthe same axis and pointing in oppositedirections; a two part hollow fixture of insulatingfmaterial: 7 dividedin the plane of'thevertical axis of" said lamp sockets and adapted inpartto embrace the latter; said fixture including'when assembled, abase,,a lamp socket housing and a single arm between-said base andhousingy, said arm having laterally spaced passages to communicate withthe, interior of said housingc whereby service wires may extend throughsaid arm into connection with said the fixture parts together; andcooperative tongues and recesses respectively formed at and in the planeof the meeting edge portions of said fixture parts and adapted by theirinterengagement to retain said parts against rotative displacement onefrom the other about the axis of said fastening means.

4. An electric lighting fixture comprising two lamp sockets aligned onthe same axis and pointing in opposite directions, a twopart hollowfixture of insulating material divided in the plane of the vertical axisof said lamp sockets and adapted in part to embrace the latter; saidfixture including, when assembled, a base, a lamp sockethousing and asingle arm between said base and housing; said arm having laterallyspaced passages to communicate with the interior of said housing wherebyservice wires may extend through said arm into said housing interior; acommon means to connect one service wire to the shell contacts of bothlamp sockets, means to connect the other service wire to a centercontact of one lamp socket, a switch means operative to make and breakconnection between the center contacts of said lamp sockets; saidhousing portions of said fixture having openings through which externalparts of said switch means may project; a single fastening meansextending laterally through said arm to bind the fixture parts together;and cooperative tongues and recesses respectively formed at and in theplane of the meeting edge portions of said fixture parts and adapted bytheir interengagement to retain said parts against rotative displacement one from the other about the axis of said fastening means.

, Signed at New York, N.'Y., on this 17th day of February 1925.

ERNEST GANTELO WHITE.

